package com.android.launcher2;
import java.util.ArrayList;
import java.util.List;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.util.Log;
/*** Stores the list of all applications for the all apps view.  */
class AllAppsList {
    public static final int DEFAULT_APPLICATIONS_NUMBER = 42;
    /** The list off all apps. */
    public ArrayList<ApplicationInfo> data = new ArrayList<ApplicationInfo>(DEFAULT_APPLICATIONS_NUMBER);
    /** The list of apps that have been added since the last notify() call. */
    public ArrayList<ApplicationInfo> added = new ArrayList<ApplicationInfo>(DEFAULT_APPLICATIONS_NUMBER);
    /** The list of apps that have been removed since the last notify() call. */
    public ArrayList<ApplicationInfo> removed = new ArrayList<ApplicationInfo>();
    /** The list of apps that have been modified since the last notify() call. */
    public ArrayList<ApplicationInfo> modified = new ArrayList<ApplicationInfo>();
    private IconCache mIconCache;

    /**  Boring constructor. */
    public AllAppsList(IconCache iconCache) {
        mIconCache = iconCache;
    }

    /** Add the supplied ApplicationInfo objects to the list, and enqueue it into the list to broadcast when notify() is called. If the app is already in the list, doesn't add it. */
    public void add(ApplicationInfo info) {
        if (findActivity(data, info.componentName)) {
            return;
        }
//        Log.e("Hegel---", "app = "+info.componentName.getClassName());
        if (info.componentName.getClassName().equals("com.google.android.apps.inputmethod.libs.framework.core.LauncherActivity")) {
			Log.e("Hegel---AllAppsList", "I will hide the icon of GooglePinyin.apk");
        	return;
		}
        data.add(info);
        added.add(info);
    }
    
    public void clear() {
        data.clear();
        // do we clear these too?
        added.clear();
        removed.clear();
        modified.clear();
    }

    public int size() {
        return data.size();
    }

    public ApplicationInfo get(int index) {
        return data.get(index);
    }

    /** * Add the icons for the supplied apk called packageName.
     */
    public void addPackage(Context context, String packageName) {
        final List<ResolveInfo> matches = findActivitiesForPackage(context, packageName);

        if (matches.size() > 0) {
            for (ResolveInfo info : matches) {
                add(new ApplicationInfo(context.getPackageManager(), info, mIconCache, null));
            }
        }
    }

    /**
     * Remove the apps for the given apk identified by packageName.
     */
    public void removePackage(String packageName) {
        final List<ApplicationInfo> data = this.data;
        for (int i = data.size() - 1; i >= 0; i--) {
            ApplicationInfo info = data.get(i);
            final ComponentName component = info.intent.getComponent();
            if (packageName.equals(component.getPackageName())) {
                removed.add(info);
                data.remove(i);
            }
        }
        // This is more aggressive than it needs to be.
        mIconCache.flush();
    }

    /** Add and remove icons for this package which has been updated.  zgy */
    public void updatePackage(Context context, String packageName) {
        final List<ResolveInfo> matches = findActivitiesForPackage(context, packageName);
        if (matches.size() > 0) {
            // Find disabled/removed activities and remove them from data and add them to the removed list.
            for (int i = data.size() - 1; i >= 0; i--) {
                final ApplicationInfo applicationInfo = data.get(i);
                final ComponentName component = applicationInfo.intent.getComponent();
                if (packageName.equals(component.getPackageName())) {
                    if (!findActivity(matches, component)) {
                        removed.add(applicationInfo);
                        mIconCache.remove(component);
                        data.remove(i);
                    }
                }
            }

            // Find enabled activities and add them to the adapter Also updates existing activities with new labels/icons
            int count = matches.size();
            for (int i = 0; i < count; i++) {
                final ResolveInfo info = matches.get(i);
                ApplicationInfo applicationInfo = findApplicationInfoLocked(info.activityInfo.applicationInfo.packageName, info.activityInfo.name);
                if (applicationInfo == null) {
                    add(new ApplicationInfo(context.getPackageManager(), info, mIconCache, null));
                } else {
                    mIconCache.remove(applicationInfo.componentName);
                    mIconCache.getTitleAndIcon(applicationInfo, info, null);
                    modified.add(applicationInfo);
                }
            }
        } else {
            // Remove all data for this package.
            for (int i = data.size() - 1; i >= 0; i--) {
                final ApplicationInfo applicationInfo = data.get(i);
                final ComponentName component = applicationInfo.intent.getComponent();
                if (packageName.equals(component.getPackageName())) {
                    removed.add(applicationInfo);
                    mIconCache.remove(component);
                    data.remove(i);
                }
            }
        }
    }

    /**
     * Query the package manager for MAIN/LAUNCHER activities in the supplied package.
     */
    private static List<ResolveInfo> findActivitiesForPackage(Context context, String packageName) {
        final PackageManager packageManager = context.getPackageManager();

        final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        mainIntent.setPackage(packageName);

        final List<ResolveInfo> apps = packageManager.queryIntentActivities(mainIntent, 0);
        return apps != null ? apps : new ArrayList<ResolveInfo>();
    }

    /**
     * Returns whether <em>apps</em> contains <em>component</em>.
     */
    private static boolean findActivity(List<ResolveInfo> apps, ComponentName component) {
        final String className = component.getClassName();
        for (ResolveInfo info : apps) {
            final ActivityInfo activityInfo = info.activityInfo;
            if (activityInfo.name.equals(className)) {
                return true;
            }
        }
        return false;
    }

    /**
     * Returns whether <em>apps</em> contains <em>component</em>.
     */
    private static boolean findActivity(ArrayList<ApplicationInfo> apps, ComponentName component) {
        final int N = apps.size();
        for (int i=0; i<N; i++) {
            final ApplicationInfo info = apps.get(i);
            if (info.componentName.equals(component)) {
                return true;
            }
        }
        return false;
    }

    /**
     * Find an ApplicationInfo object for the given packageName and className.
     */
    private ApplicationInfo findApplicationInfoLocked(String packageName, String className) {
        for (ApplicationInfo info: data) {
            final ComponentName component = info.intent.getComponent();
            if (packageName.equals(component.getPackageName()) && className.equals(component.getClassName())) {
                return info;
            }
        }
        return null;
    }
}
